HALP ILL MARK U BRAINLEST :D

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30

Extra points! find the missing dimension! need asap

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.